Articles: Cooling

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Design and Functionality

The thing that impresses you when you see Evercool Silent Shark is its size and weight. This cooler is 165 mm tall, 140 mm wide and 166 mm long and weighs 1246 grams. All in all, it is a very large and heavy cooler, just the way it is supposed to be:


However, the design of the Silent Shark is not that new. It consists of an aluminum heatsink on six copper heatpipes that go through the copper base. The heatsink is topped with a plastic cap and is equipped with two cooling fans:


One of the fans is installed between the heatsink arrays, while the other one – on one of the exterior sides of the heatsink:


Each heatsink array consists of 45 aluminum fins, each measuring 140x45 mm and 0.4 mm thick. The fins are firmly pressed against the heatpipes 2 mm away from one another.

Note that the fins are pressed against the entire surface of the heatpipes, without the so-called “locks”. This is the most efficient method of ensuring proper contact between the heatpipes and heatsink fins.

The heatsink arrays are slightly pushed away from one another. Evercool refers to this solution as a V-heatsink, but we do not know the actual practical reasons for that:


At the same time, I would like to point out that the heatsink is not optimized in any way towards reducing the airflow resistance, except for a low-profile deepening in the very center of the heatsink, which can hardly be regarded as an actual optimization of this sort.

The heatpipes pierce heatsink arrays along the same line at 20 mm distance from one another:

The heatpipes lie very close to one another inside special grooves in the base of the cooler. Evercool soldered all contact areas in the base. The base plate measures 40x37 mm and has a very well-finished surface:

It is also impeccably even. That as well as the high pressure hold provided by the cooler retention produce very uniform thermal paste imprints:


Evercool Silent Shark heatsink is equipped with two 120 mm fans that are attached to the plastic top cover with screws:

These are two different fans, although both of them are manufactured by Evercool:

The external fan impeller has seven flat blades with “shark fins” on them and is called Silent Shark. As you may have already guessed, this is where he cooler’s name comes from. The rotation speed of this fan may not be adjusted and is set at 1400 RPM. However, our tests showed that the fan was rotating at 1670 RPM, which is 15% more than the declared specification. The cooler is supposed to generate up to 26 dBA of noise and create 60.6 CFM airflow.


The second fan (model EC12025H12EP) also measures 120x120x25 mm, but features a completely different type of impeller and supports PWM rotation speed adjustment. Its fan works in the 800 RPM-2200 RPM rotation speed range. The official maximum noise level is declared at 16 dBA, which seems to be the noise reading at the minimal fan speed. The created airflow is at 60.6 CFM. Both fans of the Evercool Silent Shark cooler are built with fluid dynamic bearings that should last at least 60,000 hours.

Now that we have discussed the cooling fans, it is time to reveal that unique peculiarity of the Evercool Silent Shark cooler that was mentioned before. Namely, it allows placing the exterior fan at a 30-degree angle to the heatsink array it is attached to:

This allows directing the airflow towards the memory modules and heatsinks on the voltage regulator components around the processor socket thus lowering their operational temperature. Unfortunately, Evercool doesn’t mention how greatly this measure affects the efficiency of the actual CPU cooling.

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